Senior Software Engineer I - Ruby on Rails with Sidekiq

LexisNexis Risk Solutions; Philadelphia (Philadelphia County); On-site; USD 87,000 - 144,000; Full time

Benefits offered by this job

Annual bonus

Country-specific benefits

Job summary

Elsevier's Wellsheet platform in Philadelphia, PA is hiring a Senior Software Engineer I to own platform APIs and backend services built with Ruby on Rails and Sidekiq, on AWS. You’ll work on real-time EHR integration, data pipelines, and internal tooling, with a TypeScript frontend for internal interfaces.

The role emphasizes end-to-end ownership, strong SQL skills, and observability. You’ll join a small, senior engineering team shipping production-grade features to hospitals and clinicians

Qualifications

• Experience with Ruby on Rails and Sidekiq in a production AWS environment.
• Strong SQL and relational data modeling skills.
• Experience with end-to-end ownership of production systems and strong debugging/logging mindset.

Responsibilities

• Owning platform subsystems end to end: ingestion pipelines, sync reliability, normalization.
• Keeping the stack healthy: upgrades, developer tooling, and CI for a small team.
• Diagnosing and fixing complex issues (e.g., vendor FHIR quirks) with durable solutions.
• Building platform API surfaces and internal tooling used by multiple teams.

Skills

Ruby on Rails

Sidekiq

TypeScript

SQL

End-to-end ownership

Observability

Logging

AWS ECS

Tools

Aurora PostgreSQL

Job description

## Senior Software Engineer I - Ruby on Rails with SidekiqApplylocations: Philadelphia, PA: Pennsylvania: New Yorktime type: Full timeposted on: Posted Todayjob requisition id: R116811**Senior Software Engineer**: Clinical Data Platform · Wellsheet at Elsevier**About Wellsheet at Elsevier:** Wellsheet is a clinical decision support platform used by more than 20,000 providers across 100+ hospitals. We embed directly in the EHR (Epic, Cerner, Athena) and put AI-generated clinical context in front of clinicians at the bedside. In 2026 Wellsheet became part of Elsevier's Clinical Solutions group, and we're now building the next generation of our product: a new clinical AI experience shipping to our first hospital clients in early 2027, backed by an integration platform we've run in production for years. We're a small, all-senior engineering team. You'll own real surface area from your first weeks, work directly with the people who built the system, and ship software that clinicians use during patient care. No healthcare background is required. We train the clinical and interoperability domain; we hire for engineering judgment.**About the team** The Platform squad runs the machinery underneath everything clinicians see: real-time EHR sync across Epic, Cerner, and Athena, FHIR ingestion for 100+ hospitals, and vocabulary normalization across 125+ clinical terminologies. The squad is led directly by the technical leader behind Wellsheet's platform. Its next major build, which you'll help kick off, is the platform API that other Elsevier clinical products and internal teams will consume. The squad also owns the internal tooling for managing the platform and the health of the stack itself, from framework upgrades to developer tooling.**Our stack today** is Ruby on Rails with Sidekiq on AWS (ECS, Aurora PostgreSQL), with a TypeScript frontend where our tools need one. The work is mostly backend, but internal tools need real interfaces, and this squad builds its own. We don't require prior experience in any of the stack.**About the role** You will build the platform API alongside the squad lead: own endpoints, contracts, and the extraction work that turns internal seams into a real interface. You will also be building the internal tooling for managing the platform, frontends included: vocabulary mapping, data quality, hospital onboarding, and the operational views that let a small team run 100+hospitalsResponsibilities* Owning platform subsystems end to end: ingestion pipelines, sync reliability, normalization.* Keeping the stack healthy: major framework and dependency upgrades, developer tooling, and the CI that keeps a small team fast.* Taking of loosely specified problems ("this vendor's FHIR implementation does something strange under load") through diagnosis, design, and durable fixes.* Keeping correctness and observability strong as the platform takes on new consumers.* Pair with the engineer who built our sync and normalization systems and take ownership of one production pipeline, including its on-call. Your first shipped work will be a piece of the platform API or the internal tooling around it. By month three you'll own a platform surface that other teams depend on.**Requirements*** Current development skills with Ruby on Rails with Sidekiq on AWS (ECS, Aurora PostgreSQL), with a TypeScript frontend.* Possess backend fundamentals: queues, retries, transactions, and the failure modes between them.* Have real depth in SQL and relational data modeling, and the instinct to check the query plan.* Possess End-to-end ownership of production systems, including the unglamorous parts.* Have a debugging temperament: patient, methodical, happy in logs.* AI-assisted development as a default: coding agents and spec-driven development are already part of how you workElsevier is a renowned global information analytics company that primarily focuses on providing scientific, technical, and medical (STM) research content, tools, and services. It is one of the largest publishers of academic journals and scholarly literature in the world.Elsevier operates in various domains, including science, technology, medicine, social sciences, and more. They publish a vast number of peer-reviewed journals covering a wide range of disciplines. These journals act as platforms for researchers and academics to share their findings and contribute to the advancement of knowledge in their respective fields.U.S. National Base Pay Range: $86,600 - $144,400. Geographic differentials may apply in some locations to better reflect local market rates.If performed in New York, the base pay range is $95,300 - $158,900.If performed in New York City, the base pay range is $103,900 - $173,300.If performed in Rochester, NY, the base pay range is $86,600 - $144,400.This job is eligible for an annual incentive bonus.**We know your well-being and happiness are key to a long and successful career. We are delighted to offer country specific benefits. Click** **here** **to access benefits specific to your location.**We are committed to providing a fair and accessible hiring process. If you have a disability or other need that requires accommodation or adjustment, please let us know by completing our Applicant Request Support Form or please contact 1-855-833-5120.**Criminals may pose as recruiters asking for money or personal information. We never request money or banking details from job applicants. Learn more about spotting and avoiding scams** **here****.**Please read our Candidate Privacy Policy.We are an equal opportunity employer: qualified applicants are considered for and treated during employment without regard to race, color, creed, religion, sex, national origin, citizenship status, disability status, protected veteran status, age, marital status, sexual orientation, gender identity, genetic information, or any other characteristic protected by law.